A prefabricated stair

Abstract

This application discloses a prefabricated staircase, relating to the technical field of building engineering, including a staircase middle section; an upper staircase section at the top of the middle section and a lower staircase section at the bottom; steps, with sliders positioned opposite each other on the side of the steps facing the middle section; a sliding groove on the side of the middle section facing the steps, with the sliders sliding within the groove in a one-to-one correspondence; limiting blocks on the opposite sidewalls of the sliders, and limiting grooves on the opposite sidewalls of the sliding groove, with the limiting blocks sliding within the limiting grooves; an upper receiving groove at the bottom of the upper staircase and a lower receiving groove at the bottom of the lower staircase, with a transmission groove on the sidewall of the sliding groove away from the groove opening; upper connecting holes in the upper and middle sections, and lower connecting holes in the lower and middle sections; a grouting hole at the top of the upper section, and an overflow outlet on the side of the sliding groove near the grouting hole closest to the upper section. This application facilitates the installation of the prefabricated staircase.

Description

Technical Field

[0001] This application relates to the technical field of building engineering, and in particular to a prefabricated staircase. Background Technology

[0002] Precast staircases, as an important component in building construction, are increasingly widely used in the construction industry. They offer significant advantages such as high quality, high efficiency, flexible design, and environmental friendliness and energy conservation, greatly promoting the efficient implementation of construction projects and providing strong support for the rapid construction and high-quality presentation of modern buildings. This allows for more standardized and regulated construction, effectively improving the overall quality and performance of buildings.

[0003] In traditional construction, the conventional approach for installing prefabricated stairs is to first manufacture them in a factory, then transport them to the construction site. Upon arrival, lifting equipment is used to move the stairs to the installation location. Finally, the stairs are placed in the installation area, fine-tuned, and then connected and secured to the building structure. This construction method is a common process for installing prefabricated stairs in the construction industry and has long been widely used in various construction projects.

[0004] However, existing precast staircase construction methods have significant drawbacks. Because precast staircases are generally made of concrete, they are quite heavy. This presents numerous difficulties during hoisting and transporting the staircases, and adjusting their position after placement is extremely inconvenient, severely impacting construction efficiency and accuracy. Summary of the Invention

[0005] To facilitate the installation of prefabricated stairs, this application provides a prefabricated staircase.

[0006] This application provides a prefabricated staircase, which adopts the following technical solution:

[0007] A prefabricated staircase includes a middle section of the staircase, which is inclined.

[0008] The upper section of the staircase is located at the top of the middle section of the staircase, and the lower section of the staircase is located at the bottom of the middle section of the staircase. The upper section of the staircase and the lower section of the staircase are parallel to each other.

[0009] A step is slidably disposed on the middle section of the staircase, and a slider is disposed opposite to the side of the step facing the middle section of the staircase.

[0010] The middle section of the staircase has a sliding groove facing the steps. The sliding groove extends from the upper section of the staircase to the lower section of the staircase. The sliders slide in the sliding groove and correspond one-to-one.

[0011] The slider has a limiting block on each of its opposite sidewalls, and the slide groove has a limiting groove on each of its opposite sidewalls, and the limiting block slides in the limiting groove.

[0012] The upper section of the staircase has an upper receiving groove at its bottom, the lower section of the staircase has a lower receiving groove at its bottom, and the sliding groove has a transmission groove on the side wall away from the groove opening.

[0013] The upper section and the middle section of the staircase are respectively provided with upper connecting holes that connect the upper receiving groove and one of the transmission grooves; the lower section and the middle section of the staircase are respectively provided with symmetrical lower connecting holes that connect the lower receiving groove and the transmission groove.

[0014] The top of the upper section of the staircase has a grouting hole that connects to the upper receiving groove, and the side of the chute near the grouting hole is an overflow outlet.

[0015] By adopting the above technical solution, the prefabricated staircase features a split design, separating the steps from the middle section of the staircase, significantly reducing the overall weight and facilitating hoisting and repositioning. During installation, the steps are simply lowered one by one from the middle section of the staircase near the upper part on the previous floor, allowing them to slide downwards. The steps slide stably on the middle section of the staircase through the cooperation of sliders and grooves, reducing installation difficulty and improving safety. Furthermore, there is no need to step onto the middle section of the staircase during installation, reducing the possibility of positional displacement. Grouting is achieved through grouting holes, upper receiving grooves, and lower receiving grooves, ensuring a secure connection between the various parts of the staircase.

[0016] Optionally, a first abutment plate is provided in the middle section of the staircase, and the first abutment plate is located on the groove wall of the slide near the lower section of the staircase;

[0017] The staircase includes a first staircase and a second staircase. The first staircase is located near the lower section of the staircase, and the slider of the first staircase abuts against the first abutment plate.

[0018] The second step is located between the first step and the upper section of the staircase. A second abutment plate is provided in the middle section of the staircase. The second abutment plate slides between the slide groove and the transmission groove. The slider of the second step corresponds one-to-one with the second abutment plate.

[0019] A control component is provided in the middle section of the staircase. When the slider of the first step abuts against the first abutment plate, the control component controls the adjacent second abutment plate to slide from the transmission groove into the slide groove.

[0020] When the slider of the second step abuts against the corresponding second abutment plate, the control component controls the adjacent second abutment plate to slide from the transmission groove into the slide groove.

[0021] By adopting the above technical solution, the steps can slide on the middle section of the stairs, making it easy to adjust their position; by controlling the second abutment plate to slide into the slide groove in sequence according to the abutment of the slider, the steps can be installed and positioned segment by segment, which solves the problem of the prefabricated stairs being inconvenient to lift and adjust due to their own weight.

[0022] Optionally, the control assembly includes a first control rope, a first control post, a second control post, a second control rope, a third control rope, a connecting block, and a control block;

[0023] The first abutment plate has a first control groove on the side facing away from the lower section of the staircase, and the first control post is disposed on the slider of the first step and inserted into the first control groove.

[0024] The first control rope slides through the first abutment plate and the middle section of the staircase. One end of the first control rope passes through the first control groove and is connected to the first abutment plate. The other end of the first control rope is connected to the side wall of an adjacent second abutment plate on the first abutment plate.

[0025] When the first control column is inserted into the first control groove, the first control rope is pulled, and at this time the adjacent second abutment plate slides into the groove.

[0026] The second abutment plate has a second control groove on the side facing away from the lower section of the stairs, and the second control post is disposed on the slider of the second abutment plate and inserted into the second control groove;

[0027] The control block is slidably connected to the second abutment plate, and the second control rope is slidably inserted into the second abutment plate. One end of the second control rope passes through the second control groove and is connected to the second abutment plate, and the other end is connected to the control block.

[0028] The connecting block is slidably connected to the middle section of the staircase, and the third control rope is slidably threaded through the middle section of the staircase. One end of the third control rope is connected to the connecting block, and the other end is connected to the side wall of the adjacent second abutment plate above.

[0029] The second abutment plate has a sliding groove on its side wall for the connecting block to slide, and the control block protrudes into the sliding groove;

[0030] The control block has a dovetail groove on its side wall. When the second abutment plate slides into the groove, the connecting block slides into the dovetail groove.

[0031] By adopting the above technical solution, and utilizing the control components consisting of the first control rope, the first control column, the second control column, the second control rope, the third control rope, the connecting block, and the control block, the system automatically controls the adjacent second abutment plate to slide into the groove when the slider of the first step abuts the first abutment plate, and automatically controls the adjacent second abutment plate to slide into the groove when the slider of the second step abuts the corresponding second abutment plate, thereby improving the automation and convenience of assembling each step of the prefabricated staircase.

[0032] Optionally, when the second step abuts against the second abutting plate, the second step abuts against the first step, and adjacent second steps abut against each other.

[0033] By adopting the above technical solution, the possibility of cement leakage in the chute can be reduced.

[0034] Optionally, a buffer layer is provided on the side of the first abutment plate and the second abutment plate facing away from the lower section of the staircase;

[0035] A sealing strip is provided on the side of the second step near the lower section of the staircase, and sealing grooves are provided on the side of the second step and the first step away from the lower section of the staircase for the corresponding sealing strip to be inserted.

[0036] By adopting the above technical solution, the buffer layer can reduce the impact force when the first step and the second step abut against the first abutment plate and the second abutment plate, thus playing a buffering role; the sealing strip inserted into the sealing groove can reduce the possibility of cement leakage between the first step and the second step.

[0037] Optionally, the middle section of the staircase facing the step has a connecting groove that connects to the slide, and the connecting groove corresponds one-to-one with the step.

[0038] By adopting the above technical solution, the cement in the chute can flow into the connecting groove, which helps to improve the connection strength between the steps and the middle section of the stairs.

[0039] Optionally, the floor slab is provided with a plug-in column, and the upper section and the lower section of the staircase are respectively provided with plug-in slots for the plug-in column to be inserted. The plug-in slots are respectively connected to the upper receiving slot and the lower receiving slot. The diameter of the plug-in slot is larger than the diameter of the plug-in column.

[0040] By adopting the above technical solution, it is easy to accurately connect and install the prefabricated stairs with the floor slab, and the grouting can better fix the stairs and the floor slab, which also facilitates subsequent fine-tuning of the position to a certain extent.

[0041] Optionally, a sealing ring is provided at the bottom of the upper section of the staircase and at the bottom of the lower section of the staircase, and the sealing ring surrounds the upper receiving groove and the lower receiving groove, respectively.

[0042] By adopting the above technical solution, the possibility of grout leakage from the contact surface between the upper and lower sections of the stairs and the floor slab during the installation of precast stairs can be reduced, which helps to ensure the quality of grouting.

[0043] In summary, this application includes at least one of the following beneficial effects:

[0044] 1. The prefabricated staircase adopts a split design, separating the steps from the middle section of the staircase, which greatly reduces the overall weight and facilitates hoisting and repositioning;

[0045] 2. When installing the stairs, simply place each step from the middle section of the stairs near the top section on the floor above. This allows the steps to slide down the stairs. The steps slide stably in the middle section of the stairs through the cooperation of the slider and the groove. This reduces the difficulty of installing the stairs and improves their safety. At the same time, there is no need to step on the middle section of the stairs during installation, reducing the possibility of the stairs shifting position. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the external structure of an embodiment of this application;

[0047] Figure 2 This is a schematic diagram of the internal cross-section of an embodiment of this application;

[0048] Figure 3 yes Figure 2 Enlarged schematic diagram of part A;

[0049] Figure 4 This is a structural schematic diagram of the middle section of the staircase in an embodiment of this application;

[0050] Figure 5 This is a schematic diagram of the internal cross-section of the middle section of the staircase in an embodiment of this application;

[0051] Figure 6 yes Figure 5 Enlarged schematic diagram of part B;

[0052] Figure 7 yes Figure 5 Enlarged schematic diagram of part C.

[0053] Reference numerals: 1. Middle section of staircase; 11. Upper section of staircase; 111. Upper receiving groove; 112. Upper connecting hole; 113. Grouting hole; 12. Lower section of staircase; 121. Lower receiving groove; 122. Lower connecting hole; 13. Sliding groove; 131. Restricting groove; 132. Overflow outlet; 14. Transfer groove; 15. Connecting groove; 2. Step; 21. Sliding block; 211. Buffer layer; 22. Sealing strip; 23. Sealing groove 3. First step; 4. Second step; 5. First abutment plate; 51. First control groove; 6. Second abutment plate; 61. Second control groove; 62. Sliding groove; 7. First control rope; 71. First control post; 72. Second control post; 73. Second control rope; 74. Third control rope; 75. Connecting block; 76. Control block; 761. Dovetail groove; 8. Insertion post; 81. Insertion groove; 9. Sealing ring. Detailed Implementation

[0054] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0055] This application discloses a prefabricated staircase.

[0056] See Figure 1 The prefabricated staircase provided in this application embodiment includes a middle section 1, which is inclined and serves as the main support for the entire prefabricated staircase. The inclined design of the middle section 1 provides a suitable slope for people to ascend and descend. An upper section 11 is integrally cast on one side of the top of the middle section 1, and a lower section 12 is integrally cast on one side of the bottom of the staircase. The upper section 11 and the lower section 12 are parallel. During construction, the middle section 1 is lifted using hoisting equipment, moving the middle section 1, the upper section 11, and the upper section 12 between the upper and lower floors. This allows the upper section 11 to abut against the floor slab of the upper floor, and the lower section 12 to abut against the floor slab of the lower floor. Then, by pushing the upper section 11 and the lower section 12, the position of the staircase is fine-tuned. Because the weight of the staircase is significantly reduced, the difficulty of hoisting and adjusting its position is reduced.

[0057] The prefabricated staircase also includes steps 2, which slide along the inclined direction of the middle section 1 and are connected to the upward side of the middle section 1. There are multiple steps 2, which are evenly distributed, and the length of each step 2 is parallel to the width of the middle section 1. Specifically, the middle section 1 has two symmetrically arranged sliding grooves 13 on the side facing the steps 2. The opening of the sliding grooves 13 is located at the top of the middle section 1, near the upper section 11. The extension direction of the sliding grooves 13 is parallel to the length direction of the middle section 1, and the sliding grooves 13 extend from the upper section 11 to the lower section 12.

[0058] See Figure 1 and Figure 2 The end face of step 2 is a right-angled triangle. During installation, the inclined side of step 2 is slidably connected to the upward side of the middle section 1 of the staircase. Step 2 is made of cast concrete. There are two sliders 21 fixedly connected to the side of step 2 facing the middle section of step 2. The sliders 21 are arranged opposite each other and slide in the groove 13 and correspond one to one.

[0059] The slider 21 can be made of concrete and cast integrally with the step 2, or it can be made of metal, such as stainless steel, which has good wear resistance and strength; or it can be made of high-strength plastic, which is lightweight and low-cost. The groove 13 provides a track for the sliding of the step 2, allowing the step 2 to move along a specific path on the middle section 1 of the stairs.

[0060] See Figure 2 and Figure 3 Limiting blocks are fixedly connected to the opposite side walls of the slider 21. Limiting grooves 131 are respectively opened on the opposite side walls of the slide groove 13 along its length. The limiting grooves 131 are connected to the slide groove 13, and the limiting blocks slide in the limiting grooves 131. The cooperation between the limiting blocks and the limiting grooves 131 can prevent the slider 21 from disengaging from the slide groove 13, ensuring the stability and safety of the slide of the step 2. For example, the limiting block can be a rectangular block structure that fits tightly with the limiting groove 131, effectively limiting the horizontal swaying of the slider 21. A connecting groove 15 is opened on the side of the middle section 1 of the staircase facing the step 2. The connecting groove 15 is connected to the slide groove 13. The connecting groove 15 corresponds one-to-one with the step 2, and the side of the step 2 facing the middle section 1 of the staircase covers the opening of the connecting groove 15.

[0061] An upper receiving groove 111 is provided on the bottom end face of the upper section 11 of the staircase, and a lower receiving groove 121 is provided on the bottom end face of the lower section 12 of the staircase. A transmission groove 14 is provided in the middle section 1 of the staircase. The transmission groove 14 is located on the groove wall of the slide 13 away from the groove opening. The transmission groove 14 is connected to the slide 13, and the extension direction of the transmission groove 14 is parallel to the extension direction of the slide 13. The opening of the upper receiving groove 111, the lower receiving groove 121, and the transmission groove 14 provides space for subsequent grouting and other operations.

[0062] A downward-extending grouting hole 113 is provided on the top end face of the upper section 11 of the staircase (grouting hole 113 is located at...). Figure 4(Winning bid), grouting hole 113 connects to upper receiving groove 111. Upper section 11 and middle section 1 of the staircase each have interconnected upper connecting holes 112. One side of the upper connecting hole 112 connects to the upper receiving groove 111, and the other side connects to the transmission groove 14 away from the grouting hole 113. Lower section 12 and middle section 1 of the staircase each have interconnected lower connecting holes 122. There are two lower connecting holes 122 arranged symmetrically. One side of each lower connecting hole 122 connects to the lower receiving groove 121, and the side of the lower connecting hole 122 away from the lower receiving groove 121 connects to the transmission groove 14. The interconnected structure of the upper connecting holes 112 and lower connecting holes 122 enables cement transfer between the upper receiving groove 111, the lower receiving groove 121, and the two chutes 13. The chute 13 closest to the upper section 11 of the staircase, away from the grouting hole 113, has an overflow outlet 132 (the overflow outlet 132 is located in...). Figure 4 (Winning bid).

[0063] See Figure 3 and Figure 4 Sealing rings 9 are embedded and fixed at the bottom of the upper section 11 and the lower section 12 of the staircase, respectively. The two sealing rings 9 surround the upper receiving groove 111 (the upper receiving groove 111 is in Figure 3 (The winning bid) and the lower receiving groove 121. When the staircase is placed, the two sealing rings 9 abut against the upper and lower floor slabs respectively. The sealing rings 9 can be made of rubber, which has good sealing performance and can reduce the possibility of cement leakage into the surrounding environment. When the staircase is placed and adjusted, cement is poured into the upper receiving groove 111 through the grouting hole 113. After the upper receiving groove 111 is filled with cement, it flows into the transmission groove 14 away from the grouting hole 113 through the upper connecting hole 112. The transmission groove 14 and the slide groove 13 away from the grouting hole 113 are filled respectively. At the same time, when the cement is poured into the slide groove 13, the cement in the slide groove 13 can flow into the connecting groove 15. Then, the lower receiving groove 121 is poured through the lower connecting hole 122. Then, cement is poured into the transmission groove 14 and the slide groove 13 near the grouting hole 113 through the lower connecting hole 122 until the cement is full and flows out from the overflow port 132. At this time, the cement pouring can be stopped. After the cement hardens, the upper section 11 and the lower section 12 of the staircase are connected and fixed to the floor slab, and the step 2 is connected and fixed to the middle section 1 of the staircase.

[0064] See Figure 2 and Figure 3To enhance the connection strength between the upper section 11 of the staircase and the floor slab, and between the lower section 12 of the staircase and the floor slab, multiple insertion slots 81 are provided in both sections. These slots 81 are connected to corresponding upper receiving slots 111 and lower receiving slots 121. The staircase also includes insertion posts 8, which are pre-installed in the floor slab during construction. When the staircase is placed, the insertion posts 8 are inserted into the insertion slots 81, where the diameter of the slots 81 is larger than the diameter of the insertion posts 8. During grouting, cement flows into the insertion slots 81, enhancing the connection strength between the upper section 11 and the floor slab, and between the lower section 12 and the floor slab. The cooperation between the insertion posts 8 and the insertion slots 81 allows the prefabricated staircase to be accurately installed on the floor slab, leaving a certain gap for subsequent fine-tuning and facilitating cement flow to further enhance the connection strength.

[0065] See Figure 1 and Figure 3 The staircase 2 includes a first staircase 3 and a second staircase 4. The first staircase 3 is located near the lower section 12 of the staircase, and the second staircase 4 is located on the side of the first staircase 3 away from the lower section 12. There are multiple second staircases 4, which are evenly distributed towards the upper section 11 of the staircase. A first abutment plate 5 is fixedly connected to the middle section 1 of the staircase. The first abutment plates 5 are located in the sliding groove 13 and correspond one-to-one. The first abutment plates 5 are located on the groove wall of the sliding groove 13 on the side of the sliding groove 13 near the lower section 12 of the staircase. When the first staircase 3 is installed, the slider 21 of the first staircase 3 abuts against the side of the first abutment plate 5 away from the lower section 12 of the staircase.

[0066] See Figure 4 and Figure 5 The middle section 1 of the staircase is also equipped with a second abutment plate 6, which slides between the self-sliding groove 13 and the transmission groove 14. The second step 4 (the second step 4 is in Figure 3 The slider 21 (marked in the middle) corresponds one-to-one with the second abutment plate 6. The first abutment plate 5 and the second abutment plate 6 can be made of wood, which has a certain elasticity and cushioning performance; or they can be made of rubber, which can better absorb impact.

[0067] See Figure 6 and Figure 7 The middle section 1 of the staircase is also equipped with a control component, which includes a first control rope 7, a first control post 71, a second control post 72, a second control rope 73, a third control rope 74, a connecting block 75, and a control block 76.

[0068] See Figure 5 and Figure 7 The first abutment plate 5 has a first control groove 51 on the side facing away from the lower section 12 of the stairs. There are two first control grooves 51, which are symmetrically arranged. The first control posts 71 are fixedly connected to the first step 3 (the first step 3 is in Figure 3On the slider 21 (marked), the first control post 71 corresponds one-to-one with the first control slot 51, and the first control post 71 is located on the side of the slider 21 near the lower section 12 of the stairs. When the slider 21 of the first step 3 abuts against the first abutting plate 5, the first control post 71 is inserted into the first control slot 51.

[0069] See Figure 6 and Figure 7 The first control rope 7 is slidably threaded through the first abutment plate 5 and the middle section 1 of the staircase. There are two first control ropes 7, each corresponding to a first control groove 51. One end of the first control rope 7 passes through the first control groove 51 and is fixedly connected to the groove wall of the first control groove 51, while the other end is connected to the side wall of the adjacent second abutment plate 6 above the first abutment plate 5. When the first control post 71 is inserted into the first control groove 51, the first control rope 7 is pulled, at which time the adjacent second abutment plate 6 slides into the sliding groove 13 (the sliding groove 13 is in...). Figure 3 (Winning bid) During production, the middle section 1 of the staircase is formed by concrete pouring. At this time, a pipe can be reserved in the formwork used for pouring the middle section 1 of the staircase for the first control rope 7 to pass through. After the middle section 1 of the staircase solidifies, the first control rope 7 is passed through the reserved pipe and then connected to the first abutment plate 5 and the second abutment plate 6. Then, the first abutment plate 5 is fixed to the middle section 1 of the staircase, and the second abutment plate 6 slides into the transmission groove 14, so that the first control rope 7 is in a taut state.

[0070] See Figure 5 and Figure 6 The second abutment plate 6 has a second control groove 61, located on the side of the second abutment plate 6 facing away from the lower section 12 of the stairs. There are two second control grooves 61, symmetrically arranged. A second control post 72 is mounted on the slider 21 of the second abutment plate 6, located on the side of the slider 21 of the second abutment plate 6 closest to the first abutment plate 5. There are two second control posts 72, each corresponding to a second control groove 61. When the second step 4 (the second step 4 is in...) Figure 3 When the slider 21 (marked out) abuts against the second abutment plate 6, the second control post 72 is inserted into the second control groove 61.

[0071] Control blocks 76 are slidably connected within the second abutment plate 6. There are two control blocks 76, each corresponding to a second control groove 61. The two second control grooves 61 are located between the two control blocks 76. Second control ropes 73 are slidably threaded through the second abutment plate 6. There are two second control ropes 73, each corresponding to a control block 76. One end of the second control rope 73 passes through the second control groove 61 and is fixedly connected to the groove wall of the second control groove 61, while the other end is fixedly connected to the side wall of the control block 76 near the second control groove 61.

[0072] See Figure 4 and Figure 6The connecting block 75 is slidably connected to the wall of the vertical slide groove 13 along its length. The third control rope 74 is slidably threaded through the middle section 1 of the staircase. One end of the third control rope 74 is fixedly connected to the connecting block 75, and the other end is fixedly connected to the side wall of the adjacent second abutment plate 6. A sliding groove 62 is provided on the side wall of the second abutment plate 6. When the second abutment plate 6 slides between the transmission groove 14 and the slide groove 13, the connecting block 75 slides within the sliding groove 62. The control block 76 protrudes into the sliding groove 62. A dovetail groove 761 is provided on the side wall of the control block 76 facing away from the second control rope 73. The shape of the connecting block 75 is adapted to the dovetail groove 761. When the second abutment plate 6 slides into the slide groove 13, the connecting block 75 slides into the dovetail groove 761. At this time, the connecting block 75 and the control block 76 can be connected to each other. When the second control column 72 is inserted into the second control groove 61, the second control column 72 pulls the second control rope 73, causing the control block 76 to slide away from the slide groove 13 into the second abutment plate 6. At this time, the control block 76 causes the connecting block 75 to slide into the second abutment plate 6 together. When the connecting block 75 slides into the second abutment plate 6, the third control rope 74 pulls the adjacent second control rope 73 from the transmission groove 14 into the slide groove 13. During production, the sliding channels of the third control rope 74 and the connecting block 75 are the same as those of the first control rope 7, which are pre-reserved pipes during the pouring of the middle section 1 of the staircase.

[0073] See Figure 3 When the second step 4 abuts against the second abutting plate 6, the second step 4 abuts against the first step 3, and adjacent second steps 4 also abut against each other, which can reduce cement overflow in the slide groove 13. Simultaneously, during the installation of the first step 3 and the second step 4, in order to reduce the impact force when the first step 3 abuts against the second step 4 and between the second steps 4, buffer layers 211 are fixedly connected to the side of the first abutting plate 5 and the second abutting plate 6 facing away from the lower section 12 of the stairs. The buffer layer 211 can be made of sponge material, which can effectively reduce the noise and impact force generated when the slider 21 collides with the abutting plate; it can also be made of foam rubber material, which has good elasticity and cushioning performance. A sealing strip 22 is fixedly connected to the side of the second step 4 near the lower section 12 of the stairs. Sealing grooves 23 are opened on the side of the second step 4 and the side of the first step 3 facing away from the lower section 12 of the stairs. When the first step 3 abuts against the second step 4 and adjacent second steps 4 abut against each other, the corresponding sealing strip 22 is inserted into the sealing groove 23. The combination of the sealing strip 22 and the sealing groove 23 can reduce the possibility of cement leakage and help ensure the grouting effect.

[0074] The implementation principle of a prefabricated staircase in this application embodiment is as follows:

[0075] The precast staircase adopts a split design, separating the steps 2 from the middle section 1, which greatly reduces the overall weight and facilitates hoisting and repositioning. During installation, steps 2 are simply lowered one by one from the side of the middle section 1 closest to the upper section 11 on the previous floor, allowing them to slide towards the lower section 12. Steps 2 slide stably on the middle section 1 through the cooperation of sliders 21 and grooves 13, reducing installation difficulty and improving safety. Furthermore, steps 2 do not require stepping on the middle section 1 during installation, reducing the possibility of positional shift. Grouting is achieved through grouting holes 113, upper receiving grooves 111, and lower receiving grooves 121, ensuring a secure connection between the various parts of the staircase. The sealing strips 22, sealing grooves 23, and sealing rings 9 limit grout leakage and improve construction quality. Compared with existing technologies, this significantly improves the installation efficiency and accuracy of precast staircases, solving the problems of heavy weight, inconvenient hoisting, and difficult repositioning associated with traditional precast staircases.

[0076] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pre-fabricated stairway characterized by: The stair middle section (1) is arranged obliquely; The top of the stair middle section (1) is provided with a stair upper section (11), and the bottom of the stair middle section (1) is provided with a stair lower section (12), and the stair upper section (11) is parallel to the stair lower section (12); The ladder (2) is arranged on the stair middle section (1) in a sliding manner, and the ladder (2) is provided with a sliding block (21) on one side of the stair middle section (1) in a relative manner; The stair middle section (1) is provided with a sliding groove (13) on one side of the stair middle section (1) facing the ladder (2), the sliding groove (13) extends from the stair upper section (11) to the stair lower section (12), and the sliding block (21) slides in the sliding groove (13) in a one-to-one correspondence manner; The sliding block (21) is provided with a limiting block on the side wall of the opposite side, and the sliding groove (13) is provided with a limiting groove (131) on the groove wall of the opposite side, and the limiting block slides in the limiting groove (131); The bottom of the stair upper section (11) is provided with an upper accommodating groove (111), the bottom of the stair lower section (12) is provided with a lower accommodating groove (121), and the groove wall of the side of the sliding groove (13) away from the groove opening is provided with a transmission groove (14); The stair upper section (11) and the stair middle section (1) are respectively provided with an upper communication hole (112) communicating the upper accommodating groove (111) and one of the transmission grooves (14), and the stair lower section (12) and the stair middle section (1) are respectively provided with a lower communication hole (122) symmetrically and communicating the lower accommodating groove (121) and the transmission groove (14); The top of the stair upper section (11) is provided with a grouting hole (113) communicating to the upper accommodating groove (111), and the side of the sliding groove (13) close to the grouting hole (113) is close to the stair upper section (11) side as a grout overflow port (132).

2. A pre-fabricated stair according to claim 1, characterized in that: The stair middle section (1) is provided with a first abutting plate (5), and the first abutting plate (5) is located on the groove wall of the side of the sliding groove (13) close to the stair lower section (12); The ladder (2) comprises a first ladder (3) and a second ladder (4), the first ladder (3) is located close to the stair lower section (12), and the sliding block (21) of the first ladder (3) abuts on the first abutting plate (5); The second ladder (4) is located between the first ladder (3) and the stair upper section (11), the stair middle section (1) is provided with a second abutting plate (6), the second abutting plate (6) slides between the sliding groove (13) and the transmission groove (14), and the sliding block (21) of the second ladder (4) corresponds to the second abutting plate (6) in a one-to-one correspondence manner; The stair middle section (1) is provided with a control assembly, when the sliding block (21) of the first ladder (3) abuts on the first abutting plate (5), the control assembly controls the last adjacent second abutting plate (6) to slide into the sliding groove (13) from the transmission groove (14). When the slider (21) of the second step (4) abuts against the corresponding second abutting plate (6), the control assembly controls the last adjacent second abutting plate (6) to slide from the transmission groove (14) into the sliding groove (13).

3. A pre-fabricated stair according to claim 2, wherein: The control assembly comprises a first control rope (7), a first control column (71), a second control column (72), a second control rope (73), a third control rope (74), a connecting block (75), and a control block (76); The first control column (71) is arranged on the slider (21) of the first step (3), and the first control column (71) is inserted into the first control groove (51); The first control rope (7) is slidably arranged in the first abutting plate (5) and the middle section of the stairs (1), one end of the first control rope (7) passes through the first control groove (51) and is connected to the first abutting plate (5), and the other end of the first control rope (7) is connected to the side wall of the last adjacent second abutting plate (6) on the first abutting plate (5); When the first control column (71) is inserted into the first control groove (51), the first control rope (7) is pulled, and at this time, the last adjacent second abutting plate (6) slides into the sliding groove (13); The second control column (72) is arranged on the slider (21) of the second abutting plate (6), and the second control column (72) is inserted into the second control groove (61); The control block (76) is slidably connected in the second abutting plate (6), the second control rope (73) is slidably arranged in the second abutting plate (6), one end of the second control rope (73) passes through the second control groove (61) and is connected to the second abutting plate (6), and the other end is connected to the control block (76); The connecting block (75) is slidably connected to the middle section of the stairs (1), the third control rope (74) is slidably arranged in the middle section of the stairs (1), one end of the third control rope (74) is connected to the connecting block (75), and the other end is connected to the side wall of the last adjacent second abutting plate (6); The second abutting plate (6) is provided with a sliding groove (62) for the sliding of the connecting block (75) on the side wall, and the control block (76) protrudes into the sliding groove (62); The control block (76) is provided with a dovetail groove (761) on the side wall, and when the second abutting plate (6) slides into the sliding groove (13), the connecting block (75) slides into the dovetail groove (761).

4. A pre-fabricated stair according to claim 2, wherein: When the second step (4) abuts against the second abutting plate (6), the second step (4) abuts against the first step (3), and the adjacent second steps (4) abut against each other.

5. A pre-fabricated stair according to claim 2, wherein: The first abutting plate (5) and the second abutting plate (6) are provided with a buffer layer (211) on the side away from the lower section of the stairs (12). The second ladder (4) is provided with a blocking strip (22) on one side close to the lower stair section (12), and the second ladder (4) and the first ladder (3) are provided with blocking grooves (23) on the side away from the lower stair section (12) for the blocking strip (22) to be clamped in.

6. A pre-fabricated stair according to claim 1, characterized in that: The middle stair section (1) is provided with a connecting groove (15) on the side facing the ladder (2), and the connecting groove (15) corresponds to the ladder (2) one by one.

7. A pre-fabricated stair according to claim 1, characterized in that: The floor is provided with a plug-in column (8), the upper stair section (11) and the lower stair section (12) are respectively provided with a plug-in groove (81) for the plug-in column (8) to be inserted, the plug-in groove (81) is respectively communicated with the upper containing groove (111) and the lower containing groove (121), and the diameter of the plug-in groove (81) is greater than the diameter of the plug-in column (8).

8. A pre-fabricated stair according to claim 1, characterized in that: The bottom of the upper stair section (11) and the bottom of the lower stair section (12) are respectively provided with a sealing ring (9), and the sealing ring (9) surrounds the upper containing groove (111) and the lower containing groove (121) respectively.

Images